finally more VRAM
Posted: Tue Feb 13, 2018 11:35 am
Hi,
after more than 30 years, a dream became true for me: I have extended my MZ-800 with the additional 16KB of VRAM.
Now I can use all 16 colors at once (at 'lores' 320x200 - and 4 colors at 'hires' 640x200).
Back in 1986-88 I had no idea how to get Sharps VRAM extension and what it would cost (surely more than I could afford).
Years later I read somewhere on the Web, that Sharp just used some standard DRAM chips of the time.
It is called MB81416-12 (16kx4 DRAM) from Fujitsu and I could find a pair on Ebay (Germany) for just 3.5€ :
https://www.ebay.de/itm/2x-MB81416-12-1 ... 2056573597
It's two chips and it has to be the 120ns version (not MB81416-15).
In theory there should be chips with the same specs from TI ( TMS4416-12NL) but not tested it.
The standard VRAM on my MZ-800 board are at least from Fujitsu.
after more than 30 years, a dream became true for me: I have extended my MZ-800 with the additional 16KB of VRAM.
Now I can use all 16 colors at once (at 'lores' 320x200 - and 4 colors at 'hires' 640x200).
Back in 1986-88 I had no idea how to get Sharps VRAM extension and what it would cost (surely more than I could afford).
Years later I read somewhere on the Web, that Sharp just used some standard DRAM chips of the time.
It is called MB81416-12 (16kx4 DRAM) from Fujitsu and I could find a pair on Ebay (Germany) for just 3.5€ :
https://www.ebay.de/itm/2x-MB81416-12-1 ... 2056573597
It's two chips and it has to be the 120ns version (not MB81416-15).
In theory there should be chips with the same specs from TI ( TMS4416-12NL) but not tested it.
The standard VRAM on my MZ-800 board are at least from Fujitsu.